Unusual Movements of Newfoundland Black Bears

Payne, Neil F.

doi:10.2307/3800247

Cited by 14 publications

(11 citation statements)

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“…Dunn,personal communication;P. Olesiuk,personal communication) and higher than the rates of sea otters, Enhydra ltltrzs (Garshelis and Garshelis 1984, Ralls et al 1992, Estes et al 1993, bears (Payne 1975;Stirling et al 1977;Thier and Sizemore 1981;Miller and Ballard 1982;Rogers 1986Rogers , 1987, and bats (Davis 1966) over similar distances. Moreover, homing performance improved with age, suggesting that adults would show the highest return rates.…”

Section: Discussionmentioning

confidence: 93%

Homing Behavior of Juvenile Northern Elephant Seals

Oliver

Morris

Thorson

et al. 1998

Marine Mammal Science

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The aim of this study was to determine if juvenile northern elephant seals, Mirounga angustirostris, translocated from their rookery would return to it quickly and reliably. During the spring and fall of 1990 and 1991 we captured 75 seals at Año Nuevo State Reserve, CA, U. S. A. and translocated them to release sites up to 100 km away. Eighty‐eight percent of the seals returned to the capture site within 4.7 ± 4.3 d. Homing rate increased with age, but even the youngest seals (8–10 mo) homed at a 73% rate. Homing rate did not vary significantly with sex, season, or year. Data from diving instruments suggested that the seals often followed direct routes home, arrived on the rookery significantly more often at night than during the day, and when released together, returned separately. Mean homing speed of 18 seals with complete diving records was 39 km/d (range 3–70 km/d). Instruments on seals had no detectable effect on homing rate or homing speed. The translocation paradigm provides a powerful tool for conducting intensive shortterm studies on free‐ranging seals.

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Section: Discussionmentioning

confidence: 93%

Homing Behavior of Juvenile Northern Elephant Seals

Oliver

Morris

Thorson

et al. 1998

Marine Mammal Science

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“…The Island of Newfoundland is thought to support between 3000 and 10 000 black bears (Payne 1977;Rich 1986), and there is no reason to believe that bears in Terra Nova National Park are isolated from the rest of the population. Hunting pressure is reported to be very light on this population (Payne 1978) and there are no records of dramatic population reductions in historic times. Both prehistoric population bottlenecks and random genetic drift may have contributed to the relative paucity of observed variation, but it is impossible to determine which has had the greater effect without accurate and independent estimates of p and N,.…”

Section: Discussionmentioning

confidence: 99%

Microsatellite analysis of genetic variation in black bear populations

1994

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Measuring levels of genetic variation is an important aspect of conservation genetics. The informativeness of such measurements is related to the variability of the genetic markers used; a particular concern in species, such as bears, which are characterized by low levels of genetic variation resulting from low population densities and small effective population sizes. We describe the development of microsatellite analysis in bears and its use in assessing interpopulation differences in genetic variation in black bears from three Canadian National Parks. These markers are highly variable and allowed identification of dramatic differences in both distribution and amount of variation between populations. Low levels of variation were observed in a population from the Island of Newfoundland. The significance of interpopulation differences in variability was tested using a likelihood ratio test of estimates of theta = 4Ne mu.

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“…Orphaned cubs of the year that are older maybe left in the wild. Information from researchers and managers in Michigan ( (Erickson 1959), Minnesota (Rogers 1992), Newfoundland (Payne 1975) has shown that cubs that become orphaned in mid to late summer/fall (at 5months of age or older and after July 1) have shown high survival on their own in suitable habitat. In general, larger, older cubs and sibling cubs released together stand a better chance of survival.…”

Section: Options For Management Of Orphaned Bear Cubsmentioning

confidence: 99%

The late-denning activities of the American black bear in Utah

Miller¹,

Smith²,

Auger

et al. 2017

Ursus

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EXECUTIVE SUMMARYDuring the early part of the 20 th Century, predators were subjected to high levels of take because of real or perceived threats to human health or safety and conflicts with agriculture/livestock. Many of our native predators have reestablished and are now very common in Oregon. The Oregon Department of Fish and Wildlife (ODFW or department) recognizes the high value of our native wildlife, including predators, and manages for a balance between sustainable populations and acceptable levels of conflicts, which is challenging at times. Public attitude toward black bears (and other wildlife species) has changed during the past several decades, and increasing black bear populations have increased the complexity of certain management issues. State wildlife agencies have been, "…caught in the middle and try to maintain a balance with their management strategies," (Pelton 2000:390) as they shift from goals related to population recovery to goals related to regulation of abundance. The mission of the department is to protect and enhance Oregon's fish and wildlife populations and their habitats for use and enjoyment by present and future generations. This plan is the strategy of the department to meet its mission for management of black bears in Oregon.The 2012 Oregon Black Bear Management Plan updates the 1993-1998 Oregon Black Bear Management Plan. During the planning and revision process, stakeholder groups were invited and provided input for the plan. A public comment period also was utilized during the revision process to inform the public of the intent of the plan, how black bears are managed in Oregon, and for the department to consider public input on bear management.The plan includes information on biology and ecology of bears, with a focus on Oregon; historical and current management approaches; and biological data collection. The plan also establishes a set of four objectives designed to balance ecological, social, and economic considerations for informed decision making when managing populations of black bears. These objectives are not considered mutually exclusive; therefore, some level of trade-off is to be expected under certain situations. As with the previous bear management plans, the department continues to develop efficient and effective bear management strategies to meet objectives within its personnel and fiscal resource limitations.Objective 1 is to maintain healthy and optimum bear populations while providing optimum recreational opportunities, and considering objectives related to other wildlife species and the level of human-bear conflicts. Management of individual species should include considerations related to an ecosystem-based management approach. Management of other wildlife species, such as deer and elk, may affect management of bears, including those related to population abundance. Decisions related to management of harvested species include providing recreational opportunities for hunters. Therefore, objectives should be balanced and trade-offs should be acknowledged. ...

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Unusual Movements of Newfoundland Black Bears

Cited by 14 publications

References 0 publications

Homing Behavior of Juvenile Northern Elephant Seals

Homing Behavior of Juvenile Northern Elephant Seals

Microsatellite analysis of genetic variation in black bear populations

The late-denning activities of the American black bear in Utah

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